Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7564474d1f093b…

MALICIOUS

PDF

44.1 KB Created: 2020-08-21 10:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4281057be072df116ce640d363126f8c SHA-1: 1dda7a4088acf5fc47db74f32ddebf83a64e37da SHA-256: 0e7564474d1f093be58ae272796475568527df9b387e0c5e0784409a6a87458e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, a common tactic for link farming or distributing malicious content. One of the embedded URLs, https://ttraff.com/pify?keyword=how+are+you+doing+answers, is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to lure users to malicious sites or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=how+are+you+doing+answers
    • http://files.ridgeforensics.com/uploads/1/3/2/3/132303024/71ee56f2.pdf
    • http://files.kevinsaundersactor.com/uploads/1/3/0/9/130969429/509c0b76.pdf
    • http://files.4th.mrslambsroom.com/uploads/1/3/0/7/130775174/rakemonosa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/9699/7030/files/karya_ilmiah_bahaya_merokok.pdf
    • https://cdn.shopify.com/s/files/1/0433/4387/2153/files/android_ndk_install_command_line.pdf
    • https://cdn.shopify.com/s/files/1/0431/8386/6007/files/36742529907.pdf
    • https://cdn.shopify.com/s/files/1/0430/0324/8803/files/light_on_life_bks_iyengar_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5021/3274/files/41602584256.pdf
    • https://cdn.shopify.com/s/files/1/0430/9693/2505/files/puduzala.pdf
    • https://cdn.shopify.com/s/files/1/0432/6418/0390/files/din_en_iso_527_1.pdf
    • https://cdn.shopify.com/s/files/1/0431/9438/4546/files/email_distribution_list_template_excel.pdf
    • https://cdn.shopify.com/s/files/1/0435/8209/5517/files/solidworks_surfacing_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0428/2882/4742/files/principles_of_business_information_systems_paperback_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/3117/5063/files/lalidukuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8020/3944/files/maryland_manual_del_conductor.pdf
    • https://cdn.shopify.com/s/files/1/0437/3640/0037/files/wumag.pdf
    • https://cdn.shopify.com/s/files/1/0427/7967/2735/files/geometric_progression_problems_with_solutions.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f96.bin
b513f9e9965d30fc65580f58ce132a23b4ac1b1f4aa136d28e10a642888fca53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F96 5116 bytes
font_01_sfnt_off0000811f.bin
93d09656ed35d961a612ac02dccd63bc4b2cfc8cfadcb2ae0d5e6b2f00e439ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x811F 10120 bytes

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